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ST92124JR2TB データシート(PDF) 67 Page - STMicroelectronics |
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ST92124JR2TB データシート(HTML) 67 Page - STMicroelectronics |
67 / 426 page 67/426 ST92F124/F150/F250 - REGISTER AND MEMORY MAP 4 REGISTER AND MEMORY MAP 4.1 INTRODUCTION The ST92F124/F150/F250 register map, memory map and peripheral options are documented in this section. Use this reference information to sup- plement the functional descriptions given else- where in this document. 4.2 MEMORY CONFIGURATION The Program memory space of the ST92F124/ F150/F250 up to 256K bytes of directly addressa- ble on-chip memory, is fully available to the user. 4.2.1 Reset Vector Location The user power on reset vector must be stored in the first two physical bytes of memory, 000000h and 000001h. 4.2.2 Location of Vector for External Watchdog Refresh If an external watchdog is used, it must be re- freshed during TestFlash execution by a user writ- ten routine. This routine has to be located in Flash memory, the address where the routine starts has to be written in 000006h (one word) while the seg- ment where the routine is located has to be written in 000009h (one byte). This routine is called at least once every time that the TestFlash executes an E3 TM write operation. If the write operation has a long duration, the user routine is called with a rate fixed by location 000008h with an internal clock frequency of 2 MHz, location 000008h fixes the number of milli- seconds to wait between two calls of the user rou- tine. Table 14. User Routine Parameters If location 000006h to 000007h is virgin (FFFFh), the user routine is not called. Location Size Description 000006h to 000007h 2 bytes User routine address 000008h 1 byte ms rate at 2 MHz. 000009h 1 byte User routine segment 9 |
同様の部品番号 - ST92124JR2TB |
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同様の説明 - ST92124JR2TB |
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